The finding that semi-arid ecosystems in the Southern Hemisphere may be largely responsible for changes in global concentrations of atmospheric carbon dioxide has repercussions for future levels of this greenhouse gas. See Letter p.600
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Metcalfe, D. A sink down under. Nature 509, 566–567 (2014). https://doi.org/10.1038/nature13341
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DOI: https://doi.org/10.1038/nature13341
